.tab-left{
    float: left;
    display: inline-block;
    width: 15%;
    /*height: 300px;*/
    margin: 10px 0 5%;
    /*margin-right: 5%;*/
    /*border: 1px solid red;*/
}
.tab-right{
    width: calc(100% - 15% - 5% - 4px);
    float: left;
    /*border: 1px solid blue;*/
    display: inline-block;
}


